hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
hid-generic 0000:0000:0000.0001: unknown main item tag 0x0
INFO: task kworker/u4:4:2470 blocked for more than 140 seconds.
      Not tainted 4.9.124+ #85
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:4    D24648  2470      2 0x00000000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
 ffff8801aa212f80 ffff8801c4a52c00 ffff8801a7350580 ffff8801b9a097c0
 ffff8801db6210d8 ffff8801aa27f7f0 ffffffff8277cf52 0000000000000092
 ffffffff83ae4bc0 ffffffff82ed2ae0 000000000000304d ffff8801db6219b0
Call Trace:
 [<ffffffff8277e47f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff82788aa5>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1768
 [<ffffffff8277fea9>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff8277fea9>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff8277fea9>] wait_for_common+0x2f9/0x400 kernel/sched/completion.c:101
 [<ffffffff8277ffc8>] wait_for_completion+0x18/0x20 kernel/sched/completion.c:122
 [<ffffffff812408d4>] __synchronize_srcu+0x254/0x3b0 kernel/rcu/srcu.c:448
 [<ffffffff81240a4e>] synchronize_srcu+0x1e/0x40 kernel/rcu/srcu.c:492
 [<ffffffff815d3eae>] fsnotify_mark_destroy_list+0xfe/0x230 fs/notify/mark.c:551
 [<ffffffff815d3fee>] fsnotify_mark_destroy_workfn+0xe/0x10 fs/notify/mark.c:561
 [<ffffffff8112fcf1>] process_one_work+0x791/0x1470 kernel/workqueue.c:2092
 [<ffffffff81130aa6>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff811410dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278c21c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131401c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131401c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813f99b9>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/2121:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8155eadc>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2217:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff8278a122>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81cde522>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by kworker/u4:4/2470:
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff8112fc00>] process_one_work+0x6a0/0x1470 kernel/workqueue.c:2085
 #1:  ((reaper_work).work){+.+...}, at: [<ffffffff8112fc38>] process_one_work+0x6d8/0x1470 kernel/workqueue.c:2089

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.124+ #85
 ffff8801d9497d08 ffffffff81af4b39 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff81096740 ffff8801d9497d40
 ffffffff81aff897 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81af4b39>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af4b39>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81aff897>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81aff82a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff81096844>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff813145ad>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff813145ad>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813145ad>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813145ad>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff811410dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278c21c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6373 Comm: syz-executor3 Not tainted 4.9.124+ #85
task: ffff8801a2ed8000 task.stack: ffff8801ccd70000
RIP: 0010:[<ffffffff8130c856>] 
c [<ffffffff8130c856>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8130c856>] 
c [<ffffffff8130c856>] check_kcov_mode kernel/kcov.c:68 [inline]
RIP: 0010:[<ffffffff8130c856>] 
c [<ffffffff8130c856>] __sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:100
RSP: 0018:ffff8801ccd77ef0  EFLAGS: 00000246
RAX: ffff8801a2ed8000 RBX: ffff8801ccd77f58 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81005577 RDI: ffffffff8400f240
RBP: ffff8801ccd77ef0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffff
R13: ffff8801ccd77fd0 R14: ffff8801a2ed8000 R15: 0000000000000000
FS:  00007fb3c7d80700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000021d4000 CR3: 00000001ccd8f000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801ccd77f48
c ffffffff81005577
c 0000000000000000
c 0000000000000000
c
 0000000000000000
c 0000000000000000
c 0000000000000000
c 0000000000000000
c
 0000000000000000
c 0000000000000000
c 0000000000000000
c 0000000000000000
c
Call Trace:
 [<ffffffff81005577>] get_current arch/x86/include/asm/current.h:14 [inline]
 [<ffffffff81005577>] syscall_return_slowpath arch/x86/entry/common.c:243 [inline]
 [<ffffffff81005577>] do_syscall_64+0x1c7/0x480 arch/x86/entry/common.c:287
 [<ffffffff8278c053>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c00 
c00 
c0f 
c1f 
c00 
c55 
c48 
c89 
ce5 
c65 
c48 
c8b 
c04 
c25 
cc0 
c7d 
c01 
c00 
c65 
c8b 
c15 
c0c 
cb5 
cd0 
c7e 
c81 
ce2 
c00 
c01 
c1f 
c00 
c48 
c8b 
c75 
c08 
c75 
c2b 
c8b 
c90 
c30 
c12 
c00 
c00 
c<83> 
cfa 
c02 
c75 
c20 
c48 
c8b 
c88 
c38 
c12 
c00 
c00 
c8b 
c80 
c34 
c12 
c00 
c00 
c48 
c8b 
c11 
c